JSDB.io : JSDB is a collection of the best javascript libraries
Frend : A collection of accessible, modern front-end components.
Frend components are modest and dependency-free. They are built with web standards as a prior...
swfobject : SWFObject 2 offers two optimized Flash Player embed methods; a markup based approach and a method that relies on JavaScript & offers a JavaScript API ...
yepnope.js : A Conditional Loader For Your Polyfills!
Dropzone.js : DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews.
EnhanceJS is a new Javascript framework designed to improve the application of Progressive Enhancement by first testing browser capabilities for key Javascript and CSS support before applying advanced styles and scripts to the page.